Ruebent makes a good point and the tests are well worth doing first and foremost to isolate the problem. If the problem is not with the electronics/wiring you may then want to go and get one of the many test CDs out there that include voice and imaging test tracks. Two that come to mind are Stereophile Test CD #2 and the Chesky Jazz Sampler. Play the test tracks and note the results.
Follow that up with some reading on speaker set-up and room treatments. One thing that I have learned is that speakers do not have to be placed symmetrically in a room to sound right. Take a look at the Sumiko Master Set and Audio Physics speaker set-up methods and you will see examples of this.
Follow that up with some reading on speaker set-up and room treatments. One thing that I have learned is that speakers do not have to be placed symmetrically in a room to sound right. Take a look at the Sumiko Master Set and Audio Physics speaker set-up methods and you will see examples of this.